My developer is trying to convince me to move to .net from PHP.

I have always disliked the idea because of the costs. But he's tryiong none the less.
I've been using Movable-type on numerous websites for about a year and am 
worried about switching to another platform. I have heard fantastic things about blogengine.net.
Is there a way I can transfer all my wordpress posts into it?
Any help would be greatly appreciated!